NATURAL SCIENCES OF PHILADELPHIA. 187 



July 19 th. 



Major Le Conte, Vice-President, in the Chair. 



Present nineteen members. 



The following were presented for publication in the Proceedings : 



" Notes on American Land Shells, No. 5, by W. G. Binney." " Cata- 

 logue of Birds collected in the vicinity of FortTejon, California, with a 

 description of a new species of Syrnium, by John Xantus." 



And were referred to committees. 



July 26</t. 



Major Le Conte, Vice-President, in the Chair. 



Present thirteen members. 



The committees to which the following papers were referred reported 

 in favor of publication in the Proceedings : 



Descriptions of Four New Species of Exotic TJNIONIDJE. 

 BY ISAAC LEA. 



Unio bolloides. Testa, sulcata, subrotunda, valde ventricosa, subaequilate- 

 rali, postice subalata, antice rotundata ; valvulis subtenuibus ; natibus promi- 

 nentibus, tumidis, ad apices radiis elevatis divaricatis ; epidermide luteo-fusca, 

 crebris transversis sulcis, eradiata; dentibus cardinalibus praelongis, lamellatis, 

 valde obliquis ; lateralibu3 subloagis, lamellatis subrectisque ; margarita. alba 

 et iridescente. 



Ifab. Rio de la Plata. Soutb America. G. Von dem Busch, M. D. 



Monocondylcea planulata. Testa, alata, laevi, obovatu, valde compressa, ad 

 latere planulata, valde inasquilaterali, postice obtuse angulata, antice rotunda, ; 

 valvulis tenuissimis, pellucidis ; natibus vix prominentibus ; epidermide minu- 

 tissime striata, luteola, postice viridi, subnitida, obsolete radiata ; dentibus 

 cardinalibus parvissimis, compresso-tuberculatis, in utroque valvulo singulis ; 

 margarita caeruleo-alba et iridiscente. 



Hab. Java. G. Von dem Buscb, M. D. 



Monocondyloia khomboidea. Testa lajvi, rhombo-quadrata, valde compressa, 

 ad latere planulata, valde inaequilaterali, postice subalata, antice oblique trun- 

 cata ; valvulis tenuibus ; natibus vix prominentibus, ad apices crebrissime et 

 minute undulata : epidermide olivacea., striata, nitida, obsolete radiata; denti- 

 bus cardinalibus parvis, compresso-tuberculatis, in utroque valvulo singulis ; 

 margarita vel aurea vel purpurascente et valde iridescente. 



Hab. Euphrates River, near Bagdad, Asia. G. Von dem Busch, M. D. 



Unio rudus. Testa laevi, elliptica, crassa, infiata, inaequilaterali, postice 

 emarginata, antice oblique rotundata; valvulis valde crassis, antice crassiori- 

 bus; natibus crassis prominentibusque ; epidermide tenebroso-fusca, aspere 

 striata, radiis uncisis ; dentibus cardinalibus parviusculis, sublongis, striatis, 

 crenulatis, in utroque valvulo duplicibus; lateralibus sublongis, subcrassis, 

 granulatis curvisque , margarita alba et paulisper iridescente. 



Hab. Rio de la Plata, South America. G. Von dem Busch, M. D. 

 1859.] 



